Improved lathe-rest for turning balls



UNITED STATES PATENT OFFICE.

VILLIAM T. VOSE, OF NEWTON, MASSACHUSETTS.

IMPROVED LATHE-REST FOR TURNING BALLS.

Specification forming part of Letters Patent N0. 55,749, dated June 19,1866.

llo all eli/mn n? may concern:

Beit known that I, WILLIAM T. VOSE, of Newton, in the county of Midlesex and State of lVIassachusetts, have invented a new and l usefulImprovement in Rests for Lathes in Turning Balls; and l do herebydeclare that the following is a full, clear, and exact; description ot'the same, reference being had to the annexed drawings, made part of thisspecilication, in which- Figure 1 is a side elevation, partly n1 section, and Fig. 2 is a top view.

ln the ditterent figures the same letters rc fer to identical parts. Thered lines indicate the movement of the parts respectively.

A is the base of the rest, having its bottom fitted to a-n ordinarylatheshear. This base terminates above in the frustum ot' a cone. Theupper face has around its periphery a projecting ange, which serves as aguide for a correspondingl groove in the lower surface of the cap B,which is circular, and turns freely on a point, O, through its center,by which 1t is secured to the base. From this cap pro jects the lng D,firmly secured to it, having in its back a groove, as shown in Fig. 1,for receiving the stock H. The stock H is pivoted at I, so as to turnfreely on its pivot, as shown in Fig. 1. Through the upper part of thestock is a slot for receiving a cutting-tool, F, of any properconstruction, which is held by the setscrew G, or by any convenientdevice.

E is a set-screw Working through the stock H against the base of thegroove in the lug D, for regulation of the position ofthe stock andcutter.

The movement of the tool is controlled by hand through -the handle H.

In operating with this rest, the base heilig adjusted to the lathe inany of the usual modes, the ball to be turned being placed in the lathe,the set-screw Gr is arranged so that the feed may be graduated as thework of turning progresses by successive cuts. The point of the cutterbeing placed against. the ball to be turned, the pivot being under itscenter, the tool is turned with the progress of the cutter, so thatI bythe revolution of the ball in the lathe itwill be turned into aperfectsphere.

l do not claim a revolving rest for turning spheres, for this is notnew; but

Vhat I claim as my invention, and seek to secure by Letters Patent, is-

The arrangement of the adjustable base A, revolving cap B, lug D, withthe hinged stock H, set-screw E, cutter F, and handle H, substantiallyin the manner and for the purpose set forth.

In testimony whereof I have signed my name to this specitication in thename of two subscribing witnesses.

YM. T. VOSE.

Witnesses JOHN S. HOLLINGSHEAD, JOHN D. BLooR.

